Abstract:
A device for counterbalancing a moving part comprises an elongated torsion member surrounded by a sleeve, the sleeve being connected to the torsion member at one point and the torsion member being fixedly supported at another point spaced from said one point, the moving part and the sleeve respectively carrying cooperating elements of a cam-follower combination, the cam being shaped, taking into account the torsion characteristics of the torsion element, to produce the desired counterbalancing effect. The torsion member itself advantageously comprises a plurality of elongated narrow elements of polygonal cross-section arranged in a predetermined grouping with sides of adjacent elements engaging one another, the exposed surfaces of said elements defining at least in part a polygonal shape, operative connections to points along the length of the torsion member being effected by bodies having appropriately shaped polygonal openings into which the grouping of the narrow elements is received so as to non-rotatably engage at least some of the elements and to confine the elements so that they are maintained in that predetermined grouping. The construction of the torsion member is such that a variety of different torsion element groupings can be received within a given polygonal opening, with a still greater variation in the number of torsion elements being possible by simple modifications of those polygonal openings, so that great latitude in operating characteristics can be achieved with an essentially standardized construction.
Abstract:
A door check wherein a housing is affixed to the pivotable panel and a guide rail is affixed to the frame of a door. The housing contains a shaft which is rigidly connected with one end of an arm the other end of which is slidably guided by the rail. The shaft carries a disc cam having two asymmetric sections one of which is tracked by a spring-biased follower surrounding an antifriction bearing and tending to return the panel to its closed position and the other of which is tracked by a roller on the piston of a damper which yieldably opposes the movement of the panel back to its closed position. The configuration of the two cam sections is selected with a view to allow for a reduction of the resistance which the follower offers to opening of the door shortly after the panel leaves its closed position as well as to ensure that the damper can operate independently of the follower and vice versa. The damper has a spring which urges the roller against the cam and whose bias is not more than 50 percent of the bias of one or more springs which urge the follower against the cam.
Abstract:
A shower partition with a horizontal guide rail includes a door assembly displaceable in the guide rail by guide roller mounted on eccentric pins. Each eccentric pin is arranged in a hole provided through the upper edge of the door assembly. In the case of a shower partition of this kind, the purpose to be accomplished is to simplify vertical adjustment of the door assembly at low structural cost, and to ensure that the adjusted position is reliably secured. For this purpose each eccentric pin is slid in an elongated slot of the door assembly through an end opening. Also provided is a connector member having arms which bear upon opposite engagement surfaces of the eccentric pin in order to secure the latter against rotation.
Abstract:
An improved roller assembly is provided for guiding movement of a beverage truck overhead door, and for preventing lateral misalignment of lettering or decals on the outside of such door. The improved roller assembly includes a roller, a dished washer, and a shaft. The shaft has self-tapping exteriorly-threaded shank portion, which is received in a hinge section of a door panel.
Abstract:
A shock absorbing roller mounted on a shaft and for movement along a track, including a central hub portion and with the hub portion for mounting the roller on the shaft, a peripheral roller portion surrounding the hub portion and including means interconnecting the roller portion and the hub portion for supporting the roller portion, the roller portion including a flexible circumferential flange section extending outwardly for providing contact with the track and with the flexible circumferential flange section providing shock absorption and noise reduction with movement of the roller along the track, and at least one flexible thrust flange extending outwardly from the side of the roller and with the flexible thrust flange providing shock absorption and noise reduction with any contact of the roller from side to side movement of the roller across the track.
Abstract:
A multi-panel closure is disclosed in which a fastening member comprising a pair of integral back-to-back channels is positioned between the facing pair of edges of adjacent panels. The facing side sections of each channel grip the aforesaid edges between them. The panels are positioned so as to have at least one edge in alignment with each other. A split sleeve which is fastened to a rotatably supported closure post includes a pair of parallel flanges which receive the aligned panel edges therebetween and which are riveted to each panel along its aligned edge.
Abstract:
A roller-hinge unit for a sectional door supported on a pair of tracks, wherein opposed hinge halves on adjacent door panels are joined together by a hinge tube which is constructed of a plastic material and is snapped into position to thereby hingedly connect the two hinge halves together. The hinge tube has a flange at one end and a pair of opposed resiliently deflectable fingers at the other end which, when the tube passes through the hinge halves, snap outwardly to axially hold the two hinge halves and the tube in an axially constrained relationship. A track-engaging roller is mounted on one end of an elongated roller stem which is axially slidably received within the plastic hinge tube so that the roller can undergo at least limited axial movement relative to the hinge halves to compensate for variations in the width between the tracks. The roller is preferably provided with a urethane tread.
Abstract:
An automatic closure is disclosed which is adapted to block the flow of air through a door opening. The closure comprises a pliant curtain supported by its upper edge and by a portion of one side edge. The curtain includes a pocket which contains a bracing panel supported by the flanges of a pair of mutually perpendicular split sleeves. The sleeves are secured to a rotatable post, which normally assumes a preferred rotational position corresponding to the air-blocking position of the curtain in the door opening. The curtain, which also carries weights to facilitate its movement into and out of the latter position, is readily installed on, or removed from, its supporting structure.
Abstract:
Apparatus is provided for supporting and drivingly opening and closing an overhead single-panel door such as a garage door. The apparatus includes drive rollers protruding from the plane of the door at respective opposite upper corners thereof, which drive rollers are bearingly supported by a plate member attached to the door. These drive rollers are supported from underneath and in driving contact with fixed guide tracks arranged at the building accommodating the door. In order to insure continuous firm driving engagement of the drive rollers with the topside of the guide track, a bearing bracket is rotatably supported at the drive roller axles, which bearing bracket in turn supports a pair of counterpressure rollers engageable directly at the underside of the guide track. The counterpressure rollers are spaced from one another in the direction of travel of the guide roller at respective opposite sides of a line through the axle with the drive roller and extending downwardly, such that at least one of these counterpressure rollers is continuously in supporting backing engagement with the guide track so as to assist in assuring a firm driving contact between the guide rollers and the guide track. In preferred embodiments, an additional spring support system is provided between the drive roller and the bracket supporting the drive roller axle and the door, so as to provide an additional biasing force in the downward direction on the drive roller. In preferred embodiments, the guide track is constructed as a C-shaped cross-sectional member, and the bearing bracket includes an extension which protrudes over the top of the guide track as a safety measure to support the door in the event of an axle breakage or the like.
Abstract:
A U-shaped frame is secured to a pair of spaced fence posts, and the frame has yoke members which secure the U-frame at the top and the bottom to the fence posts. A one-way gate or turnstile is provided by rotatable members on the U-frame having turnstile arms. A means of removably securing the U-frame to the fence posts is in the form of members securing the fence posts which can be manually tightened. The entire turnstile is designed to be readily removable from the fence line or readily insertable in a fence line; if the fence posts to which it is attached are weak, the U-frame tends to strengthen them.